61 lines
1.3 KiB
C#
61 lines
1.3 KiB
C#
using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Nintendo.NES
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{
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internal sealed class Mapper180 : NesBoardBase
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{
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//Mapper 180
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//Crazy Climber (J)
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int prg_bank_mask_16k;
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byte prg_bank_16k;
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byte[] prg_banks_16k = new byte[2];
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public override bool Configure(EDetectionOrigin origin)
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{
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switch (Cart.BoardType)
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{
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case "MAPPER180":
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break;
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case "HVC-UNROM+74HC08":
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break;
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default:
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return false;
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}
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SetMirrorType(Cart.PadH, Cart.PadV);
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prg_bank_mask_16k = (Cart.PrgSize / 16) - 1;
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prg_banks_16k[0] = 0;
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return true;
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}
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public override void SyncState(Serializer ser)
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{
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base.SyncState(ser);
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ser.Sync(nameof(prg_bank_mask_16k), ref prg_bank_mask_16k);
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ser.Sync(nameof(prg_bank_16k), ref prg_bank_16k);
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ser.Sync(nameof(prg_banks_16k), ref prg_banks_16k, false);
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}
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void SyncPRG()
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{
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prg_banks_16k[1] = prg_bank_16k;
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}
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public override void WritePrg(int addr, byte value)
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{
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prg_bank_16k = (byte)(value & 7);
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SyncPRG();
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}
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public override byte ReadPrg(int addr)
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{
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int bank_16k = addr >> 14;
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int ofs = addr & ((1 << 14) - 1);
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bank_16k = prg_banks_16k[bank_16k];
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bank_16k &= prg_bank_mask_16k;
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addr = (bank_16k << 14) | ofs;
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return Rom[addr];
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}
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}
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}
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